Improvement in low-water detectors for bohiers



es. MiifssEY, or

@met otitis,

NEW rYofiifK.r N. YQ

Letters Patcnt'No. 95,7245, dated September 28', 1869.

I MPRovI-:MENT IN Low-WATER nnrncrons Fon Bomans.

The Schedule referred to in these Letters Patent and making part of the same- To dll whom fibma/yjconcem: w Be it known that LG, B. MASSEY, of the city of New York, in the county and State of NewYork,

have" invented a new and :improved `Low-Tater Detector; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the `art to make and use v the same, reference being'had to the accompanyiUgdraWiUgs,forming partfof' this specification, in Which-'- y f y .i :Figures: 1 `and f Z-are vertiealsections of my improved lo-wwater detector, showing the-,valve in diiierentpositions. y l

`Similar letters Iof referencefindicate corresponding parts. B t I Thisjnventiou' relates to a safety-attachment to stearneboilers, whereby an alarm will be instantly4 given was ,soon as the water sinks Vbelowa,certain desired level. i. v

The inventionhasfor its object to construct an apparatus which will operatewithfoertainty at low as well as` high pressure.

V,The invention consists'in' an improvedl construction `and arrangement of partsasfwill fbe'.hereinai te1"de Into the boiler4 isii'tted Aa preferably-vertical pipe B, whose lower end is about on alevel withthe low-water line, that is tors'ay, withthe' line below which the. water should not stand in the'boler. `The pipe is open at -its lower end,'and is, above "the boiler, fitted into the lower end of a vessel, 0.31 This vessel-is of cylindrical or, other suitable shape, and supports a steam whistle, D,`on its upper head. t i j i y i The entrance to the steam whistle is to be closed i by a valve, E, whichis iitted upon a cylinder or other vessel, F.

The cylinderF is enclosedwithin the vessel G,- and is smaller than the same, so that it can playup and 4in the boiler, be forced into the pipe B and vessel C,

to elevate the vesselIi,` which will float onthe water, and will thereby hold the valve -E against its seat, as in iig. 1. The valve will ,thus close the passage c to thesteam'w'histle. As soonfhowevcar-as Athe water` falls below the lower end of the'pipeB, it escapes from thevessel O, and steam enters the same. The vessel- Fwill not floatV on the steam, but will dropv so astofdrawthe valve down, as in fig. 2; l The .steam will` then enter the whistle and yblow the alarm. y The valve, in order to always fit into. the seatv at high water even if the vessel should be slightly displaced in a horizontal direction, is swivelled in the vessel 1F, with its shank d, and has a ball, e, at the lower end of' the shank, so that it mayswing in either directiom `'.lhe vessel F may, therefore, move slightly in a horizontal direction, when the valve is shut without drawing it out of rits seat. c

A vertical pipe maybe arranged within the pipe B,

by Let- 

